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GE Multilin
L30 Line Current Differential System
9-9
9 THEORY OF OPERATION
9.1 OVERVIEW
9
Time stamp values are snapshots of the local 256 bit sample counter taken at the time of the transmission or receipt of the
first message in a time stamp sequence. This could be done either in software or hardware, provided the jitter is limited to
less than plus or minus 130
s. A fixed bias in the time stamp is acceptable, provided it is the same for all terminals.
Figure 9–2: ROUND TRIP DELAY AND CLOCK OFFSET COMPUTATION FROM TIME STAMPS
831729A2.CDR
Relay 1
Send T2
i-3
Clocks mismatch
Send T1
i-2
Send T2
i-2
Send T1
i-1
Send T2
i-1
Store T2
i-2
Store T1
i-2
Capture T2
T1
i-1,
i
T1
i
Capture T1
T2
i-1,
i
T2
i
Slow down
Speed up
Send T1
i-3
Store T1
i-3
Store T2
i-3
Capture T1
i-2
T1
i-2
8.3 ms
8.3 ms
Capture T2
i-2
T2
i-2
T1
i-1
T2
i-1
( T1
T2 T2
T1 )
i -3,
i-2,
i -1,
i
( T2
T1
T1 T2 )
i -3,
i -2,
i-1,
i
Calculate 1, 1.
δ θ
Calculate 2, 2.
δ θ
COMMUNICATION PATH
t 2
t 1
Relay 2
8.3 ms
8.3 ms
8.3 ms
Содержание L30
Страница 10: ...x L30 Line Current Differential System GE Multilin TABLE OF CONTENTS ...
Страница 30: ...1 20 L30 Line Current Differential System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Страница 58: ...2 28 L30 Line Current Differential System GE Multilin 2 4 SPECIFICATIONS 2 PRODUCT DESCRIPTION 2 ...
Страница 126: ...4 30 L30 Line Current Differential System GE Multilin 4 3 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4 ...
Страница 370: ...5 244 L30 Line Current Differential System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Страница 396: ...6 26 L30 Line Current Differential System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6 ...
Страница 450: ...10 10 L30 Line Current Differential System GE Multilin 10 4 INSTANTANEOUS ELEMENTS 10 APPLICATION OF SETTINGS 10 ...
Страница 464: ...A 10 L30 Line Current Differential System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Страница 600: ...C 30 L30 Line Current Differential System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Страница 610: ...D 10 L30 Line Current Differential System GE Multilin D 1 IEC 60870 5 104 APPENDIX D D ...
Страница 622: ...E 12 L30 Line Current Differential System GE Multilin E 2 DNP POINT LISTS APPENDIX E E ...
Страница 634: ...F 12 L30 Line Current Differential System GE Multilin F 3 WARRANTY APPENDIX F F ...
Страница 644: ...x L30 Line Current Differential System GE Multilin INDEX ...